Difference between revisions of "Zfec"

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{{Entry
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|Name=Zfec
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|Short description=an "erasure code", or "forward error correction code".
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|Full description=The most widely known example of an erasure code is the RAID-5 algorithm which makes it so that in the event of the loss of any one hard drive, the stored data can be completely recovered. The algorithm in the zfec package has a similar effect, but instead of recovering from the loss of only a single element, it can be parameterized to choose in advance the number of elements whose loss it can tolerate. This package is largely based on the old "fec" library by Luigi Rizzo et al., which is a mature and optimized implementation of erasure coding. The zfec package makes several changes from the original "fec" package, including addition of the Python API, refactoring of the C API to support zero-copy operation, a few clean-ups and optimizations of the core code itself, and the addition of a command-line tool named "zfec".
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|Homepage URL=http://allmydata.org/trac/zfec
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|User level=intermediate
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|VCS checkout command=darcs get --partial http://allmydata.org/source/zfec/trunk
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|Computer languages=C,Python
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|Documentation note=https://tahoe-lafs.org/trac/zfec/browser/trunk/README.rst
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|Keywords=backup,system administration,archive,backup archive,erasure code,RAID-5
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|Version identifier=1.4.4
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|Version date=2009-01-05
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|Version status=stable
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|Version download=http://pypi.python.org/packages/source/z/zfec/zfec-1.4.4.tar.gz#md5=c7c5d5c1dd634a054bcd36fd01617fe6
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|Last review by=Donaldr3
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|Last review date=2016/10/07
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|Submitted by=Database conversion
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|Submitted date=2011-04-01
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|Status=
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|Is GNU=No
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|License verified date=2009-06-08
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}}
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{{Project license
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|License=GPLv2orlater
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|License verified by=Kelly Hopkins
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|License verified date=2009-06-08
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}}
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{{Project license
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|License=BSD_2Clause
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|License verified by=Kelly Hopkins
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|License verified date=2009-06-08
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}}
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{{Person
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|Real name=Zooko O'Whielacronx
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|Role=Maintainer
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|Email=zooko@zooko.com
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|Resource URL=
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}}
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{{Resource
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|Resource audience=Help
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|Resource kind=Homepage
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|Resource URL=http://pypi.python.org/pypi/zfec/1.4.4
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}}
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{{Resource
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|Resource audience=Developer
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|Resource kind=Mailing List Subscribe
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|Resource URL=http://allmydata.org/cgi-bin/mailman/listinfo/zfec-dev
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}}
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{{Software category
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|Interface=console
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|System-administration=backup
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|Use=system-administration
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}}
 +
{{Featured}}

Revision as of 06:53, 15 February 2017


[edit]

Zfec

http://allmydata.org/trac/zfec
an "erasure code", or "forward error correction code".

The most widely known example of an erasure code is the RAID-5 algorithm which makes it so that in the event of the loss of any one hard drive, the stored data can be completely recovered. The algorithm in the zfec package has a similar effect, but instead of recovering from the loss of only a single element, it can be parameterized to choose in advance the number of elements whose loss it can tolerate. This package is largely based on the old "fec" library by Luigi Rizzo et al., which is a mature and optimized implementation of erasure coding. The zfec package makes several changes from the original "fec" package, including addition of the Python API, refactoring of the C API to support zero-copy operation, a few clean-ups and optimizations of the core code itself, and the addition of a command-line tool named "zfec".





Licensing

License

Verified by

Verified on

Notes

Verified by

Kelly Hopkins

Verified on

8 June 2009

Verified by

Kelly Hopkins

Verified on

8 June 2009




Leaders and contributors

Contact(s)Role
Zooko O'Whielacronx Maintainer


Resources and communication

AudienceResource typeURI
Python (Ref)https://pypi.org/project/zfec
Debian (Ref)https://tracker.debian.org/pkg/zfec
DeveloperMailing List Subscribehttp://allmydata.org/cgi-bin/mailman/listinfo/zfec-dev


Software prerequisites




Entry























Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.